There is still a long way before we can avoid JavaScript to insert content right into an HTML page. iframes are still too much isolated when you want to refresh a subpart of a page.

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The browser side is ready in Chrome. The rest depends on the people who build the pages we embed.

Sure, a single case minimal example works and impressive. But there’s more this requires: The proposal authors to fix the remaining spec issues and upstream the spec into WHATWG/html and CSSWG and to garner interest in a second, interoperable implementation.

Only then it’s a standard.

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